Bobbin-holder.



No. 439I,|62.` Patented lan. I4, |902.

' T. J. MURDDCK.

BOBBIN HOLDER.

(Application filed fune 27, 1901.)

(No Model.)

INVENZ'E.'

WI TNESSIE.' @La/4 @MMA AIIURNEYE:

i bin-holder.

Unirse diaries Parenti Ormes..

THOMAS J. MURDOCK, OF FRANKLIN, MASSACHUSETTS, ASSIGNOR TO MUR- DOCK ANDGEB COMPANY, OF FRANKLIN, MASSACHUSETTS.

BOBBlN-HOLDER.

SPECIFICATION forming part of Letters Fatent No. 691,162, dated January14, 1902.

Application led .Tune 27. 1901. Serial No. 66.199. (No model.)

To @ZZ whom t may concern:

Be it known that I, THOMAS J. MuRDooK, a citizen of the UnitedStates,residin g at Franklin, in the county of Norfolk and State ofMassachusetts, have invented a new and useful Improvement inBobbin-I-Iolders, of which the following is a specification.

This invention has reference to an improvement in bobbin-holders forspinning and twisting machines; and it consists in the peculiar andnovel construction more fully set forth hereinafter.

Bobbin-holders in which the bobbin is held by means of spring-pressedclamping-arms have been heretofore provided with clamping-arms pivotallysupported on a plate or member of the holder, the clamping-arms beingusually separable members.

The object of this invention is to secure a more durable structure andreduce the oost of its manufacture. To this end I form the clamping-armsof one integral sheet of spring metal, inclose the same in a sheet-metaland non-resilient cup,and secure to a sleeve which is in turn secured tothe spindle.

Figure lis a side view of a spindle provided with a bobbin secured by myimproved bob- Fig. 2 is a transverse sectional View of the bobbin,showing the bobbin-holder. Fig. 3 is a vertical sectional View of the bobbinand bobbin-holder. Fig. 4 is a plan View of the dished spring-plate,against which the base of the bobbin bears. Fig. 5 is a top View of theclamping-arms, showing them formed of one integral sheet. Fig. 6 is aplan view of the cup forming thebase of the bobbinholder.

Similar marks of reference indicate corresponding parts in all thefigures.

In the drawings, A indicates the spindle; B, the bobbin; b, the head ofthe bobbin, and b the groove in the periphery of the bobbinhead. Thebobbin-holder consists of the cup C, the clamping-plate D, thespring-plate E,

and the sleeve F. The cup C is stamped up of rigid sheet metal and hasthe central hole c, the inclined annular bottom c', and the cylindricalrim c2. The clamping plate D, formed of a sheet of spring sheet met-al,is cut in suitable dies to form the central ring d, the spring-necks d',and the clamping-arms d2 (Z2. The whole is now placed onto a former andthe clamping-arms are bent and set to the form shown in Fig. 3, havingthe inwardlyinclined concavo-convex lower portion d3 and theoutwardly-inclined concave-convex upper portion d4'. When theclamping-arms are 'nent over a former, they are preferably rolled ou theouter surface to shape them and to set the metal and insure a reliablespring laction. The clamping-plate Eis stamped up of spring sheet metaland has the central hole c and the bearings e e projecting from theperipheral edge. The plate is dished, so as to give incline to theannular surface. The sleeve F consists of a short tubular body havingone end enlarged to form an annular shoulder.

In assembling the parts the cup C is placed on the sleeve and on top ofit the clampingplate D, upon which is placed the springplate E, so thatthe clamping-plate D is interposed between the parts C and F. upon thesleeve F. The end of the sleeve Fis now upset in a die, and the parts C,D, and E are firmly secured to the sleeve F between the annular shoulderand the annular head formed by the upsetting of the end of the sleeve.The sleeve F is now driven onto the spindle or otherwise secured to thesame. When in use, the base of the bobbin readily enters between theoutward-inclined surfaces d4 of the clamping-arms cl2. Force beingapplied to the bobbin, the clamping-arms yield outwardly until they bearagain st the rim c2 of the cup C,'when if the bobbin-head does not passby the contracted portion of the clamping-arms, extra force is requiredto insert the bobbin-head. The base of the bobbin-head bears when.properly inserted on the spring-plate E. The groove b in the peripheralsurface of the bobbin-head facilitates the holding of the head by thecontracted part of the clamping-arms at the intersection of the inclinedportions da and d4, partly entering the groove.

When the plate D with the clamping-arms is formed of sheet metal ofsufficient thickness and the clamping-arms are bent and set so as toinsure the required resiliency, the holder will firmly retain thebobbin. In the preferred form shown in the drawings the plate D and theclamping-arms are of thinner metal, and the resiliency is augmented bythe use of the ring G, formed of spirally-wound wire, inelosing theclamping-arms.

In this IOO preferred form the bottom c' of the cup C materially aidsthe clamping-arms cl2 d2 to resist the force exerted to insert thebobbin,

Having thus described my invention, I claim as new and desire to secureby Letters Patentl. The combination of a spindle, a bobbinholdercomprising an annular member provided with a set of outwardly projectingspring-necks each having a clamping-arm adapted to grip the head of thebobbin, and an annular spring-plate secured Within said bobbin-clampingmember for supporting the bobbin and pressing the same upwardly againstthe spring action of said clamping members, substantially as described.

2. The combination of a spindle, a bobbinholder comprising an annularmember provided with a set of outwardly projecting spring-necks eachhaving a clamping-arm adapted to grip the head of the bobbin, and anannular cup-shaped body having a convexed bottom secured beneath saidbobbinclamping member, the under side of said clamping member restingupon the high part of said convexed bottom, substantially as described.

3. The combination of a sleeve adapted to be xed upon a spindle, anannular member secured to said sleeve and provided with a set of radialspring-necks each having a comparatively rigid clam pi ng-arm adapted togrip the bobbin, an annular cup-shaped body secured beneath saidclamping member and the sides of the said cup-shaped body serving as astop for limiting the outward movement of said clamping-arms wheninserting the bobbin, and a cancavo-convex spring-plate secured to saidsleeve above and Within the said clamping member for receiving the baseof the bobbin and supporting the same, substantially as described.

4. The combination of .a sleeve F adapted to be tixed upon a spindle,the annular member D secured to said sleeve and provided with a set ofradial spring-necks each having a comparatively rigid clamping-armadapted to grip the bobbin, the annular cup-shaped body C securedbeneath said clamping member, the

sides of said cupshaped body serving as a stop for limiting the outwardmovement ot' said clamping-arms when inserting the bobbin, aconcavo-convex plate E secured to said sleeve above and within saidclamping member and supporting the same, and the auxiliary spring-ring Gto assist the clamping-arms in gripping the bobbin, substantially asdescribed.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

THOMAS J.` MURDOCK.

'Vitnesses:

J. A. MILLER, J r., ADA E. HAGERTY.

